3GPP ProSe/D2D and its proposed extensions to other topics such as V2X, Wearable devices RAN Aspects ICL 蔡華龍 (Hua-Lung Tsai) 105 年 09 月 12 日
Outline Introduce LTE-A ProSe (D2D) in Rel. 12/13 Further Enhancements LTE Device to Device, UE to Network Relays for IoT and Wearables in Rel.14 LTE-based V2X Services &V2V services based on LTE sidelink in Rel. 13/14 Sidelink Communication in New Radio Access Technology
Re1-13 WID Enhanced LTE Device to Device Proximity Services New WI: Enhanced Device to Device ProSe (RP-142311) Dec. 2014, RAN#66 RAN2 leads this working item (Qualcomm) Objective: Type 1 discovery for the partial and outside network coverage scenarios targeting public safety use Support the extension of network coverage using UE-to-Network Relays, including service continuity (if needed), based on Release 12 D2D communication, considering applicability to voice, video. Enhance D2D discovery support in the presence of multiple carriers and PLMNs Interference Issues 3
韓國 D2D 系統布建資訊 Korean government decided to use LTE technologies for Public Safety to build nationwide Public Safety Broadband Network (PSBN) on July 2014. Based on the Information Strategy Planning (ISP) of the Ministry of Public Safety and Security (MPSS), Korea will initiate the establishment of trial Public Safety Broadband Network (PSBN) in Pyeong-Chang City in 2015 which will host the 2018 Winter Olympic Games. This Public Safety Broadband Network (PSBN) will be expanded to 8 other major cities in 2016 and finally deployed nationwide by 2017 SAMSUNG disclose 2016 LTE products support Rel.12/13 LTE D2D Source : 3GPP Contribution R1-152232 4
D2D ProSe support three scenarios Source : appear in IEEE Communications Magazine Enhanced LTE Device-to-Device Proximity Services 2016 5
Classification PS Case In coverage Partial Out-Of-Coverage Discovery Communication R12 (Inter-cell, intra-cell) R13 (inter-carrier, inter-plmn R12 (Inter-cell, intra-cell) R13 (type1) R12 R13 (UE-to-Network Relay, Group priority communications) R13 (type1) R12 Non- PS Case In coverage Partial Out-Of-Coverage Discovery R12 (Inter-cell, intra-cell) R13 (inter-carrier, inter-plmn) Communication X X X X X Source : appear in IEEE Communications Magazine Enhanced LTE Device-to-Device Proximity Services 2016 6
Major Feature Of D2D ProSe In Rel-12 & 13 Features Release 12 Release 13 Discovery Only supported in in-coverage Supported in-coverage, partial-coverage, and out-of-coverage. UE-to-Network relay for discovery is supported. Purposes of discovery Public safety Public safety and non-public safety for incoverage, public safety for partial-coverage and out-ofcoverage Synchronization to facilitate discovery Achieved by enbs Additional mechanisms are needed Communications Synchronization to facilitate Communications Broadcast (without feedback channels) for in-coverage, partial-coverage, and out-of-coverage Achieved by enbs for in-coverage, ns while additional mechanisms are needed for partial-coverage and out-of-coverage Broadcast with Layer 3 relay for partial-coverage Reuse the mechanisms in Release 12 Priority Control Not yet supported Supported Source :IEEE Communications Magazine Enhanced LTE Device-to-Device Proximity Services 7
Further Enhancements LTE Device to Device, UE to Network Relays for Wearables New SI: Enhanced Device to Device ProSe (RP-160677) March. 2016, RAN#71 RAN2 leads this working item (Qualcomm, Huawei, Intel,LG) Objective: Enhancement of UE-to-Network relaying functionality for Wearable and IoT Enhancements to enable reliable unicast PC5 link to at least support low power, low rate and low complexity/cost devices. (IoT)
Use Case to LTE Device to Device, UE to Network Relays for IoT and Wearables Source: Qualcomm RP-160268
Architecture R2-162529 On Scenarios and Objectives for Wearables and fed2d Ericsson rue: relay UE wue: wearable UE Source: R2-162529 Schematic architecture showing the considered nodes and interfaces Coverage scenarios
PC5 R2-162741 Scenarios for FeD2D Qualcomm PC5 based UE-to-Network Relay Uu (Uplink and Downlink) Uu (Downlink) Relay UE Bidirectional relay Uni-directional relay Remote UE Advantage of D2D relay for Cat-M remote UE Advantage of D2D relay for NB-IOT remote UE
Introduction V2X China shows great interest in vehicular communications In 2014, CCSA has finished the feasible study for vehicle safety application based on TD-LTE The series of industrial standard of communication based on LTE for vehicle application began In 2015, the frequency study of V2X also started National Regulatory Authority in China will allocate the frequency of connected vehicles Vehicle manufacturers and cellular network operators also show strong interests in vehicle wireless communications for proximity safety services as well as commercial applications 3GPP s goal is to realize connected car via LTE *CCSA (China Communications Standards Association) 中國通信標準化協會 12
V2X 國際主流性評估 LTE-V2X activities in China National key project Standardization and prototyping for LTE-V wireless transmission technology (2016-2017) was released by MIIT Shanghai Intelligent Connected Vehicle Pilot Area was approved by MIIT, China. Initial plan was disclosed by Shanghai International Automobile City Phase 1 (present-2016.6): 40 connected vehicles (802.11p and LTE-V2X) Phase 2 (2016.7-2017.12): 400 connected vehicles (802.11p and LTE-V2X) Phase 3 (2018.1-2019.12): 1000 connected vehicles (LTE-V2X) Major Companies Focus Topics Important Contributions @ RAN# 70 Huawei & L.G. V2V services based on LTE sidelink - Enhancement to sidelink physical layer structure necessary for V2V - Enhancement to sidelink synchronization procedure necessary for V2V - Necessary sidelink resource allocation enhancement option(s) for V2V 13
Re1-13 SID Feasibility Study on LTE-based V2X Services New SI: Feasibility Study on LTE-based V2X Services (RP-151903) June. 2015, RAN#68 RAN1 leads this working item (LG, Huawei, CATT) Objective: To define the evaluation methodology for LTE-based V2V, V2I and V2P services to compare the performance of different technical options For support of PC5 transport for V2V services (PC5 is specific for D2D ) For support of Uu transport for V2V, and Uu,PC5 transport for V2I and V2P services 14
Rel.14 WID Support for V2V services based on LTE sidelink New WI proposal: Support for V2V services based on LTE sidelink (RP- 152293) Dec. 2015, RAN#70 RAN1 leads this working item (LG Electronics, Huawei, HiSilicon, CATT, CATR) Objective (RAN2): To identify what are necessary sidelink resource allocation enhancement option(s) among the ones captured in TR 36.885 for V2V services and specify the identified option(s) To specify a mechanism to enable E-UTRAN to select between PC5 and Uu for transport of V2V messages within network coverage, if necessary, in coordination with other working groups To specify necessary radio protocols and RRC signaling to support the above features
Road Side Unit Definition for V2X an entity supporting V2I Service that can transmit to, and receive from a UE using V2I application. RSU is implemented in an enodeb or a stationary UE. V2I Service (Vehicular-to-Infrastructure/Network) a type of V2X Service, where one party is a UE and the other party is an RSU both using V2I application. V2P Service (Vehicular-to-Pedestrian) a type of V2X Service, where both parties of the communication are UEs using V2P application V2V Service (Vehicular-to-Vehicular) a type of V2X Service, where both parties of the communication are UEs using V2V application 16
Deployment 2GHz 6GHz Source : CMCC & NTT DoCoMo 17
PC5 transport uses a dedicated carrier V2X Spectrum Uu transport and authorization/control for PC5 transport could use a licensed carrier which is also used for LTE network coverage. Authorization/control enodeb Authorization/control for PC5 licensed spectrum dedicated spectrum 2GHz 6GHz for PC5 Uu PC5 PC5 PC5 * SA: scheduling assignment
A Following enb instruction w/ intra-carrier cell coverage, w/ or w/o GNSS coverage V2X Synchronization scenario & procedure In coverage GNSS/GNSSequivalent Out of coverage B GNSS/GNSS-Equivalent w/o intra carrier cell coverage, w/ GNSS coverage GNSS GNSS enb w/ reliable GNSS enb,hop1 In coverage, GNSS,hop1 Out of coverage, GNSS,hop1 Standalone enb,hop3 enb,hop2 GNSS,hop3 GNSS,hop2 GNSS,hop3 GNSS,hop2 C w/o reliable GNSS w/ inter-carrier cellular coverage or w/o cellular coverage, w/o GNSS coverage Source : Samsung
Enhance DMRS in high Doppler case Maximum Doppler frequency is about 1.5kHz (for 6GHz carrier frequency and 280km/hr vehicle speed) Maximum carrier frequency is about 6kHz (for 6GHz carrier frequency and 1ppm mismatch, carrier spacing is 15kHz) Enhanced DMRS design Increase DMRS density Legacy DMRS location DMRS location with increased density A G C G U A R D A G C G U A R D Each DMRS contains 6PRBs 144REs to 288REs increase carrier spacing for DMRS PAPR issue and Standard Impact New DMRS pattern
PC5 enhancements for V2V (Resource Allocation) TDM (Rel. 12 D2D) FDM SA pool data pool SA One periodicity e.g. 40ms data Hybrid TDM &FDM One periodicity e.g. 40ms Source : Huawei
Enhancements to LTE D2D in Rel. 14 D2D first introduced in Release 12 D2D discovery for commercial & Public Safety use cases D2D group cast communication for Public Safety Enhancements to D2D continued in Release 13 D2D discovery enhancements to inter-frequency D2D based UE to Network relays D2D based V2X being explored in Release 14 D2D also has applications to IoT and wearables that need to be explored Source : Qualcomm RP-160268 22
New Radio Technology in Sidelink New Radio Technology in Sidelink (Qualcomm) embb IoT &MTC Source: R1-164709
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (Qualcomm) NR side link design should support V2V, ProSe, Public safety as defined in LTE, plus additional mesh embb, mesh mmtc and mesh URLLC services NR side link design should support unicast services. NR side link design should support ranging and positioning capability for new services, e.g., V2V and mission critical. Provide harmonized solution for DL, UL and SL in order provide forward compatibility for phase introduction of side link features. Suggest the group study SL in terms of: timing synchronization, discovery, node selection, traffic scheduling and mobility management/paging procedures. NR side link design should support unlicensed services. Source: R1-164709
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (Huawei) Support for UE-NW Relays Group-based UE cooperation Network multicast phase UE cooperation phase UE CG CUE1 TUE TUE CUE CUE1 TUE Source :R1-164379 Access links TRP CUE2 Cooperation link TRP CUE2 Cooperation link (a) In-coverage TUE (b) Out-of-coverage TUE
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (Huawei) Management/scheduling function for UE-NW relay Source :R1-164379
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (Huawei) Unicast for sidelink operation Sidelink should be able to handle unicast transmissions at the PHY layer, and feedback mechanisms (e.g., CSI, ACK/NAK feedback) should be supported on the sidelink. Unlicensed sidelink operation Licensed CC1 Licensed CC1 Licensed CC1 Licensed CC1 unlicensed CC0 unlicensed CC0 licensed CC0/CC2 Source :R1-164379
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (Huawei) Evolved D2D The sidelink (uplink) and the cellular link (downlink) using the same waveform can also be easily spatially multiplexed just as what is done by MU-MIMO. This will lead to higher spectral efficiency. Source :R1-164047
New Radio Technology in Sidelink (cont d) New Radio Technology in Sidelink (LG) ev2x by Sidelink